A fraction in which the numerator is less than the denominator, is known as a proper fraction. In 35, 3 < 5.
So, 35 is a proper fraction.
A fraction in which the numerator is greater than the denominator, is known as an improper fraction. In 72, 7 > 2.
So, 72 is an improper fraction.
A mixed number is a combination of a whole number and a proper fraction. In 145, 1 is a whole number and 45 is a proper fraction.
i.e. 154=1+54